Terri Vogel, an amateur motorcycle racer, averages 129.98 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.29 seconds . The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. (Source: log book of Terri Vogel) Let X be the number of seconds for a randomly selected lap. Round all answers to 4 decimal places where possible. c. The fastest 3% of laps are under  seconds. d. The middle 70% of her laps are from  seconds to  seconds.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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Section4.5: Correlation And Causation
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Terri Vogel, an amateur motorcycle racer, averages 129.98 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.29 seconds . The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. (Source: log book of Terri Vogel) Let X be the number of seconds for a randomly selected lap. Round all answers to 4 decimal places where possible.

c. The fastest 3% of laps are under  seconds.

d. The middle 70% of her laps are from  seconds to  seconds.

 

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